Since we can't be sure that we can unlink enough files on windows
here, let's let the number of permitted entries grow huge if it
really must.
We do this by letting the storagedir hold lots of entries, but still
trying to keep the number of entries under the configured limit. We
also have to tell consdiffmgr not to freak out if it can't actually
remove enough entries.
Part of a fix for bug 22752
Some parentheses were missing making the rend_max_intro_circs_per_period()
return a lower value than it was suppose to.
The calculation is that a service at most will open a number of intro points
that it wants which is 3 by default or HiddenServiceNumIntroductionPoints. Two
extra are launched for performance reason. Finally, this can happen twice for
two descriptors for the current and next time period.
From:
2 * n_intro_wanted + 2
...which resulted in 8 for 3 intro points, this commit fixes it to:
(n_intro_wanted + 2) * 2
... resulting in 12 possible intro point circuit which is the correct maximum
intro circuit allowed per period.
Last, this commit rate limits the the log message if we ever go above that
limit else over a INTRO_CIRC_RETRY_PERIOD, we can print it often!
Fixes#22159
Signed-off-by: David Goulet <dgoulet@torproject.org>
Since ssize_t is signed and might be 64 bits, we should use
tt_i64_op to make sure it's positive. Otherwise, if it is negative,
and we use tt_u64_op, we'll be treating it as a uint64_t, and we
won't detect negative values.
This fixes CID 1416338 and 1416339. Bug not in any released Tor.
That check was wrong:
a) We should be making sure that the size of `key` is big enough before
proceeding, since that's the buffer that we would overread with the
tor_memeq() below.
The old check used to check that `req_key_str` is big enough which is
not right, since we won't read deep into that buffer.
The new check makes sure that `key` has enough size to survive the
tor_memeq(), and if not it moves to the next element of the strmap.
b) That check shouldn't be a BUG since that strmap contains
variable-sized elements and we should not be bugging out if we happen
to compare a small sized element (v2) to a bigger one (v3).
This way, we can clear off the directory requests from our cache and thus
allow the next client to query those HSDir again at the next SOCKS connection.
Signed-off-by: David Goulet <dgoulet@torproject.org>
v3 client now cleans up the HSDir request cache when a connection to a service
was successful.
Closes#23308
Signed-off-by: David Goulet <dgoulet@torproject.org>
We used to not copy the state which means that after HUP we would forget
if we are in overlap mode or not. That caused bugs where the service
would enter overlap mode twice, and rotate its descs twice, causing all
sorts of bugs.
Apart from the fact that a newly allocated service doesn't have descriptors
thus the move condition can never be true, the service needs the descriptor
signing key to cross-certify the authentication key of each intro point so we
need to move the descriptors between services and not only the intro points.
Fixes#23056
Signed-off-by: David Goulet <dgoulet@torproject.org>
We refactor the descriptor reupload logic to be similar to the v2 logic
where we update a global 'consider_republishing_rend_descriptors' flag
and then we use that to check for hash ring changes during the global
hidden service callbacks.
This fixes bugs where we would inspect the hash ring immediately as we
receive new dirinfo (e.g. consensus) but before running the hidden
service housekeeping events. That was leaving us in an inconsistent
state wrt hsdir indices and causing bugs all around.
The problem was that when we went from overlap mode to non-overlap mode,
we were not wiping the 'desc_next' descriptor and instead we left it on
the service. This meant that all functions that iterated service
descriptors were also inspecting the useless 'desc_next' descriptor that
should have been deleted.
This commit refactors rotate_all_descriptors() so that it rotates
descriptor both when entering overlap mode and also when leaving it.
The `test-operator-cleanup` patch, and related coccinelle patches,
don't do any checks for line length. This patch fixes the line
length issues caused by the previous commits.
This patch fixes the operator usage in src/test/*.c to use the symbolic
operators instead of the normal C comparison operators.
This patch was generated using:
./scripts/coccinelle/test-operator-cleanup src/test/*.[ch]
A client can re-extend up to 3 intro points on the same circuit. This happens
when we get NACKed by the intro point for which we choose a new intro and
re-extend the circuit to it.
That process can be arbitrarly long so reset the dirty timestamp of the
circuit everytime we choose to re-extend so we get a bit more time to actually
do our introduction.
This is a client circuit so it is short live once opened thus giving us a bit
more time to complete the introduction is ok.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When looking for an introduction circuit in circuit_get_best(), we log an info
message if we are about to launch a new intro circuit in parallel. However,
the condition was considering marked for close circuit leading to the function
triggering the log info even though there is actually no valid intro circuit.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Only register the RP circuit when it opens and not when we send the INTRODUCE1
cell else, when re-extending to a new IP, we would register the same RP
circuit with the same cookie twice leading to the circuit being closed.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Changed the assert_intro_circ_ok() to an almost non fatal function so tor can
recover properly. We keep the anonymity assert because if that is not right,
we have much deeper problems and client should stop sending bytes to the
network immediately.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This function has been replaced by hs_client_receive_rendezvous_acked(() doing
the same exact thing for both v2 and v3 service.
Signed-off-by: David Goulet <dgoulet@torproject.org>
The client needs to find the right intro point object from the circuit
identity digest it is opened to. This new function does that.
Signed-off-by: David Goulet <dgoulet@torproject.org>
New function named hs_cell_introduce1_data_clear() is introduced to clear off
an hs_cell_introduce1_data_t object.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When a client decodes a descriptor, make sure it matches the expected blinded
key which is derived from the hidden service identity key.
Signed-off-by: David Goulet <dgoulet@torproject.org>
We can't trigger a valid upload because it would require us to MOCK a long
list of functions ultimately not really testing the upload because we aren't
on a running network.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Conflicts:
src/test/test_hs_service.c
Needed by the client when fetching a descriptor. This function checks the
directory purpose and hard assert if it is not for fetching.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit makes the client use the intro point state cache. It notes down
when we get a NACK from the intro point and then uses that cache to decide if
it should either close the circuits or re-extend to a new intro point.
This also introduces a very useful function that checks if an intro point is
usable that is query the state cache and checks a series of requirement.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This cache keeps track of the state of intro points which is needed when we
have failures when using them. It is similar to the failure cache of the
legacy system.
At this commit, it is unused but initialized, cleanup and freed.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This moves it to hs_client.c so it can be used by both system (legacy and
prop224). For now, only the legacy system uses it.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Don't assert() on rend_data when closing circuits to report an IP failure. The
prop224 code doesn't have yet the support for this.
Signed-off-by: David Goulet <dgoulet@torproject.org>
For now, prop224 doesn't have a mechanism to note down connection attempts so
we only do it for legacy system using rend_data.
Signed-off-by: David Goulet <dgoulet@torproject.org>
The client can now handle RENDEZVOUS2 cell when they arrive. This consolidate
both hidden service version in one function.
Signed-off-by: David Goulet <dgoulet@torproject.org>
The client is now able to handle an INTRODUCE_ACK cell and do the appropriate
actions.
An intro point failure cache is missing and a way to close all intro point
that were launched in parallel. Some notes are in the comment for that.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a function to parse an INTRODUCE_ACK cell in hs_cell.c. Furthermore, add
an enum that lists all possible expected status code.
Signed-off-by: David Goulet <dgoulet@torproject.org>
From an edge connection object, add a function that randomly pick an
introduction point for the requested service.
This follows the code design of rend_client_get_random_intro() and returns an
extend_info_t object ready to be used to extend to.
At this commit, it is not used yet.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When a descriptor fetch has completed and it has been successfully stored in
the client cache, this callback will take appropriate actions to attach
streams and/or launch neede circuits to connect to the service.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Client now handles a RENDEZVOUS_ESTABLISHED cell when it arrives on the
rendezvous circuit. This new function applies for both the legacy system and
prop224.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a function to build the cell.
Add a the logic to send the cell when the rendezvous circuit opens.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Make a single entry point for the entire HS subsystem when a client circuit
opens (every HS version).
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a function in hs_cell.{c|h} for a client to build an INTRODUCE1 cell using
an object that contains all the needed keys to do so.
Add an entry point in hs_client.c that allows a tor client to send an
INTRODUCE1 cell on a given introduction circuit.
It includes the building of the cell, sending it and the setup of the
rendezvous circuit with the circuit identifier.
The entry point function is still unused at this commit.
Signed-off-by: David Goulet <dgoulet@torproject.org>
The hs circuit file had this function that takes a list of link specifiers and
return a newly allocated extend info object. Make it public so the client side
can also use it to be able to extend to introduction point.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Put all the possible assert() we can do on a client introduction circuit in
one helper function to make sure it is valid and usable.
It is disabled for now so gcc doesn't complain that we have a unused function.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit only moves code into a function. The client code will need a way
to take a bunch of descriptor link specifier object and encode them into link
specifiers objects.
Make this a public function so it can be used outside of hs_descriptor.c.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This will be useful to the hidden service subsystem that needs to go over all
connections of a certain state to attach them to a hidden service circuit.
Signed-off-by: David Goulet <dgoulet@torproject.org>
- Add tests that ensure that SOCKS requests for v2/v3 addresses get
intercepted and handled.
- Add test that stores and lookups an HS descriptor in the client-side cache.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Once a descriptor has been successfully downloaded from an HSDir, we flag the
directory connection to "has fetched descriptor" so the connection subsystem
doesn't trigger a new fetch on success.
Same has DIR_PURPOSE_HAS_FETCHED_RENDDESC_V2 but for prop224.
Signed-off-by: David Goulet <dgoulet@torproject.org>
